College football coaches like to say recruiting is the lifeblood of any program, and the four teams that participated in the 2017 College Football Playoff were in need of transfusions after suffering heavy personnel losses.

Outlook: The good news keeps coming for the Tigers, who signed a fourth straight top-10 recruiting class after a handful of their draft-eligible juniors decided to return for another college season.

Five-star prospect Trevor Lawrence of Cartersville, Georgia, the No. 1 pocket passer in the ESPN 300, is already enrolled and will have a chance to battle incumbent Kelly Bryant this spring. The Tigers also signed four-star receiver Justyn Ross, the No. 1 prospect in Alabama, who might be able to help right away.

After falling short of winning back-to-back national championships, the Tigers should enter 2018 as a heavy favorite to win the ACC and make their fourth straight appearance in the CFP. The Tigers will play nonconference games against two SEC foes -- at Texas A&M on Sept. 8 and at home against South Carolina on Nov. 24. They'll play Florida State on the road on Oct. 27 and will avoid Miami and Virginia Tech during the regular season.

Outlook: After winning their fifth national championship in nine seasons, the Crimson Tide face major rebuilding on and off the field. Tide coach Nick Saban had to hire five new assistant coaches, including both coordinators, after former offensive coordinator Brian Daboll left for the Buffalo Bills and former defensive coordinator Jeremy Pruitt was named Tennessee's new head coach. Outside linebackers coach Tosh Lupoi was promoted to defensive coordinator while receivers coach Mike Locksley was promoted to offensive coordinator.

The turnover was felt in Alabama's recruiting efforts. After signing the No. 1 class in six of the previous seven years, the Tide slipped to No. 6 this year, which was its worst finish since Saban's first season at Alabama. Their haul still included No. 1 defensive end Eyabi Anoma, No. 1 cornerback Patrick Surtain Jr. and No. 1 athlete Xavier Williams.

Outlook: After reaching the College Football Playoff for the first time and falling to Alabama 26-23 in overtime in the CFP National Championship, the Bulldogs used their momentum to sign the country's top recruiting class for the first time in school history.

Georgia signed 19 ESPN 300 players, including seven of the top 25, which is the most by any school in a single cycle of the ESPN 300 era. The Bulldogs' class included three five-star prospects: No. 1 dual-threat quarterback Justin Fields (the No. 1 player overall), No. 2 cornerback Tyson Campbell and No. 5 defensive end Brenton Cox. Georgia also signed No. 1 running back Zamir White, No. 1 guard Trey Hill and No. 2 guard Jamaree Salyer.

The most pressing needs for Georgia in spring practice will be rebuilding its linebacker corps, which lost Butkus Award winner Roquan Smith, Lorenzo Carter and Davin Bellamy. Top tailbacks Sony Michel and Nick Chubb also departed, but quarterback Jake Fromm returns after a sensational freshman campaign and will have four returning linemen protecting him.

Georgia's nonconference schedule isn't overwhelming, with home games against FCS foe Austin Peay, Middle Tennessee State, UMass and Georgia Tech, and it will play SEC road games at South Carolina, Missouri, LSU and Kentucky (as well as its annual contest against Florida in Jacksonville, Florida).

Outlook: The Buckeyes fell just short of reaching the CFP for the third time in four seasons, but they finished with a five-game win streak, including a 24-7 victory over USC in the Goodyear Cotton Bowl Classic.

OSU will have a quarterback battle to watch in the spring; Dwayne Haskins is the favorite to replace Barrett, but highly regarded Tate Martell is a talented, dual-threat quarterback who might bring more creativity to the offense. With J.K. Dobbins and Mike Weber back, whoever wins the job will have plenty of help.

Outlook: After guiding Oklahoma to a Big 12 title and a spot in the CFP in his first season as a head coach, Lincoln Riley produced a top-10 class in his first full recruiting effort. It's the first time in 13 years that the Sooners have had top-10 recruiting classes in consecutive cycles.

OU can only hope that the transition from Heisman Trophy winner Mayfield to Texas A&M transfer Kyler Murray goes smoothly. Murray played sparingly behind Mayfield last season, but he possesses many of the same dual-threat skills, and he'll have several playmakers around him.

Riley hired former Georgia assistant Shane Beamer as his new assistant head coach for offense and tight ends, and former Dallas Cowboys strength coach Bennie Wylie was hired to replace Jerry Schmidt, who left for Texas A&M.

Outlook: The Huskies have the best combination of quarterback (Jake Browning), offensive line and tailback (Myles Gaskin) in the Pac-12 coming back this season, and they'll have nine starters back from what was a young defense in 2017. And now they'll also have improved depth from what is undoubtedly Chris Petersen's best recruiting class.

Petersen has created a potential logjam at quarterback once Browning leaves. Along with Georgia transfer Jacob Eason, who must sit out the 2018 season under NCAA transfer rules, the Huskies are bringing in No. 2 pocket passer Jacob Sirmon of Bothell, Washington, and No. 4 pocket passer Colson Yankoff of Coeur D'Alene, Idaho.

The Huskies open next season against Auburn in Atlanta and play Pac-12 road games at Utah, UCLA, Oregon, California and Washington State.

Outlook: The Badgers won a school-record 13 games this past season, and they're bringing back a record-setting tailback and all five starting offensive linemen, which is usually a recipe for success.

But Wisconsin defensive coordinator Jim Leonhard is going to have to replace a handful of key players, especially in the secondary, where the Badgers lost three of four starters. Three of the top seven prospects in Wisconsin's recruiting class were cornerbacks, including Donte Burton of Lawrenceville, Georgia, and Rachad Wildgoose Jr. of Miami, a one-time Georgia commitment.

Wisconsin's offense is loaded for success in 2018. Running back Jonathan Taylor set the FBS freshman record with 1,977 rushing yards and will be a leading Heisman Trophy contender this coming season. Quarterback Alex Hornibrook will also be back, along with most of his top targets besides Fumagalli.

Wisconsin's schedule will be more difficult this coming season, with road games at Iowa, Michigan, Northwestern and Penn State.

Outlook: After guiding Miami to its first 10-win season since 2003 and its first appearance in the ACC championship game in his second season at his alma mater, Mark Richt continued to rebuild the Hurricanes' roster with a top-10 recruiting class.

Jarren Williams, the No. 6 dual-threat quarterback, has already enrolled in classes and will compete against returning starters Malik Rosier and redshirt freshmen N'Kosi Perry and Cade Weldon in the spring. Rosier struggled with his accuracy at times last season, but Richt continues to say Rosier is the starter.

The Hurricanes open the season on Sept. 2 against LSU in Arlington, Texas, and they'll host Florida State on Oct. 6. Their ACC road slate is manageable, with trips to Virginia, Boston College, Georgia Tech and Virginia Tech.

Outlook: After winning at least 10 games for the sixth time in the past eight seasons, Michigan State coach Mark Dantonio had to shuffle his coaching staff after co-defensive coordinator Harlon Bennett and defensive ends coach Mark Snyder left for Florida State.

Mike Tressel, who shared the coordinator duties with Bennett the past few seasons, will take over the job. Former Kent State coach Paul Haynes was hired to coach defensive backs, former Miami (Ohio) coach Don Treadwell will coach special teams and former MSU linebacker Chuck Bullough is returning to coach defensive ends.

With 19 starters coming back in 2018, Michigan State might be poised to challenge Ohio State in the Big Ten East. Brian Lewerke was dramatically better in 2017, becoming the first MSU quarterback to pass for more than 2,500 yards and run for more than 500. Tailback LJ Scott is also coming back, along with breakout receiver Felton Davis III.

Another reason for optimism: MSU gets to play both Michigan and Ohio State at home in 2018.

Outlook: After losing Barkley to the NFL draft and celebrated offensive coordinator Joe Moorhead to Mississippi State, Penn State coach James Franklin started to reload by signing what might arguably be one of the best recruiting classes in school history.

The Nittany Lions had the No. 4 recruiting class in the country, which was led by their first five-star recruits in the ESPN 300 era: defensive end Micah Parson and wide receiver Justin Shorter. In all, Penn State signed 13 players from the ESPN 300.

After struggling with depth in the trenches the last couple of seasons, Franklin hopes this class will help shore up that deficiency.

Franklin also hired two new assistant coaches to help expand Penn State's recruiting reach: former Army receivers coach David Corley and former Florida running backs coach Ja'Juan Seider. Passing-game coordinator Ricky Rahne takes over playcalling duties from Moorhead and had an impressive debut in a 35-28 win over Washington in the PlayStation Fiesta Bowl.

Penn State's schedule gets a little more difficult in 2018, with games against Iowa, Michigan, Michigan State, Ohio State and Wisconsin, but the Nittany Lions will play all but the Wolverines in Happy Valley.

Outlook: National signing day came and went without the Wolverines making a big splash, as Jim Harbaugh tries to get his program headed back in the right direction. After signing top-10 classes the previous two cycles, Michigan's class was ranked No. 20 this year.

But Michigan's move is based on the possibility that Ole Miss QB transfer Shea Patterson will be eligible to play this coming season. U-M officials are expected to file an appeal to the NCAA for relief. If Patterson starts at quarterback this coming season, the Wolverines might be poised for a big turnaround from last season's five-loss letdown.

Outlook: Tailback Bryce Love surprised a lot of people on the Farm by deciding to come back for his senior season. If he can stay healthy this coming season, the Cardinal might have enough returning talent to challenge Washington in the Pac-12 North.

Rising sophomore quarterback K.J. Costello took control of the offense in the second half of the 2017 season. He's the undisputed starter heading into spring practice, especially after former starter Keller Chryst announced he's leaving as a graduate transfer when he receives his degree in June. Stanford is also bringing back four of five starting offensive linemen, as well as top receivers JJ Arcega-Whiteside and Trenton Irwin.

Stanford signed two of the top seven pocket passers in its recruiting class: No. 5 Tanner McKee and No. 7 Jack West. McKee, from Corona, California, won't step on campus until 2020; he's completing a two-year Latter-day Saints mission before enrolling.

The Cardinal defense needs some work, after allowing almost 6 yards per play last season, and four underclassmen left for the 2018 draft: Phillips, Schultz, Reid and Meeks.

Outlook: West Virginia looks like Oklahoma's biggest threat in the Big 12 this coming season, with quarterback Will Grier and All-American David Sills V returning for their senior seasons. If Grier stays healthy, the Mountaineers should be among the most explosive offenses in the country.

The question is whether West Virginia's defense will improve. The Mountaineers added No. 21 defensive end Dante Stills, No. 16 safety Kwantel Raines, juco linebacker Charlie Benton and former Ohio State cornerback Josh Norwood to try to shore up that side of the ball.

The Mountaineers open the season against Tennessee in Charlotte, and they play Kansas State, TCU and Oklahoma at home in Big 12 play.

Outlook: The Tigers nearly crashed the CFP last season, and now they'll have to replace a lot of key pieces on offense to have a chance to challenge Alabama in the SEC West in 2018.

Replacing Johnson, who ran for 1,391 yards with 18 touchdowns, might be the biggest hole to fill, especially with Pettway also turning pro. Baylor transfer Kam Martin will have to take on a bigger role, and incoming freshmen Asa Martin, Harold Joiner and Shaun Shivers also might get early looks.

The good news: Quarterback Jarrett Stidham is returning, along with most of his top wideouts. Golson, Smith and James are three big losses up front, so new offensive line coach J.B. Grimes will have to put in work this spring. He replaced Herb Hand, who left to become Texas' co-offensive coordinator.

Along with a challenging opener against Washington in Atlanta, the Tigers will also play SEC road games at Georgia and Alabama.

Outlook: The Hokies won 19 games in coach Justin Fuente's first two seasons, and now they'll have to reload on both sides of the ball to be as successful in 2018. Quarterback Josh Jackson gives the Hokies a chance to compete for an ACC Coastal title, as long as he plays the way he did during the first half of the 2017 season.

The Hokies will need young skill players to continue to develop, including tailbacks Deshawn McClease and Steven Peoples and receivers Sean Savoy and Phil Patterson. The addition of Ball State transfer Damon Hazelton, who sat out last season, might be a big boost for the receiver corps. He had 51 catches for 505 yards with four touchdowns as a freshman.

Defensive coordinator Bud Foster will have to find replacements at defensive tackle and linebacker after Edmunds and Settle turned pro. Replacing Facyson and Stroman in the secondary is another priority. Juco CB Jeremy Webb, No. 9 ILB Dax Hollifield and No. 17 safety Chamarri Conner were big additions through recruiting.

The Hokies will play Notre Dame, Miami and Georgia Tech at home in 2018.

Outlook: The Horned Frogs are coming off another 11-win season, their third in four years, and another thrilling comeback in a bowl game. But TCU faces major facelifts on both sides of the ball heading into 2018. They lose Hill, Hicks, Diarse and four of their five starting offensive linemen. The personnel losses are deep on defense, as well, with Howard, Texada, Boesen and Orr leaving.

You're probably thinking the Horned Frogs won't be very good next year, which is exactly what coach Gary Patterson wants you to believe. TCU's recruiting class ranked No. 25 nationally, which was its highest ranking in Patterson's 17-year tenure. No. 1 juco offensive tackle Anthony McKinney and No. 11 running back Fabian Franklin were key signees.

Outlook: After becoming the first USC coach to win at least 10 games in each of his first two seasons, the Trojans rewarded coach Clay Helton with a contract extension through the 2023 season. The Trojans won the Rose Bowl in his first season and their first Pac-12 title since 2008 in his second.

Replacing Darnold, the potential No. 1 pick in the NFL draft, will be USC's biggest priority in the offseason. Rising sophomore Matt Fink, redshirt freshman Jack Sears and incoming freshman J.T. Daniels will battle for the unenviable job of succeeding him. Losing Jones, the leading rusher with 1,550 yards and 19 touchdowns, and Burnett, the top receiver with 1,114 yards and nine scores, won't make it any easier on his replacement.

Outlook: After taking over the FSU program in mid-December, former Oregon coach Willie Taggart gave the Seminoles a much-needed boost by closing the recruiting cycle with a flurry. After inheriting a recruiting effort that had been neglected by the previous staff, Taggart and his assistants assembled a class that ranked No. 11 nationally, the best of any FBS first-year coach.

Taggart can only hope that momentum carries through the offseason, as FSU is trying to recover from last season's 7-6 collapse. FSU's fortunes this coming season largely hinge of quarterback Deondre Francois' health. He was lost in a season-opening defeat to Alabama, and the Seminoles never recovered.

Cam Akers ran for 1,024 yards as a freshman, and four of five starting offensive linemen and leading receiver Nyqwan Murray are back. The FSU defense will need a makeover, especially in the secondary, where James and McFadden decided to turn pro.

FSU's road schedule in 2018 is going to be very difficult, with trips to Notre Dame, Louisville, NC State and Miami. Ouch.

Outlook: After enduring heavy roster turnover and coaching staff changes the past few seasons, the Broncos should benefit from continuity in 2018. For the first time since 2013, Boise State is bringing back its offensive, defensive and special-teams coordinators.

Quarterback Brett Rypien is returning, and all but one defensive starter is also coming back, so the Broncos should be the preseason favorites among Group of 5 teams to grab a New Year's Six bowl berth. Rypien threw for 2,877 yards with 16 touchdowns last season. He'll miss Wilson and Roh, but help might be coming through recruiting.

Vander Esch, the Mountain West Conference Defensive Player of the Year, decided to turn pro, but he's the only defensive player departing from the unit who started in the Broncos' win over Oregon in the Las Vegas Bowl.

Boise State's nonconference schedule in 2018 includes trips to Troy and Oklahoma State.

Moorhead will spend the spring implementing his offense, which ranked among the best in the FBS at Penn State. He might have similar success in Year 1 if quarterback Nick Fitzgerald returns from the broken ankle he suffered in the Egg Bowl. The Bulldogs will have four seniors back on the offensive line.

Mississippi State's defensive line will be among the best in the SEC, with four senior defensive tackles and junior Jeffery Simmons returning. Former Georgia player Chauncey Rivers, who took an academic redshirt in 2017, is also expected to be eligible.

The Bulldogs play a nonconference game at Kansas State and SEC road games at LSU, Alabama and Ole Miss next season.

Outlook: After rebounding from a 4-8 disaster in 2016 to win 10 games for the second time in three seasons, the Fighting Irish face a little uncertainty heading into 2018. The Irish were hit hard by early departures to the NFL draft -- Nelson, St. Brown and Adams declared -- and highly regarded defensive coordinator Mike Elko left for Texas A&M.

The Irish figure to have a competitive quarterback battle during the offseason. Brandon Wimbush accounted for 30 total touchdowns this past season, but he struggled to throw the ball down the field, which seemed to frustrate Kelly. Sophomore Ian Book replaced Wimbush in a 21-17 win over LSU in the Citrus Bowl and completed 14 of 19 passes for 164 yards with two touchdowns and one interception.

Notre Dame's schedule next season includes road games at Virginia Tech, Northwestern and USC and home games against Michigan, Stanford and Florida State.

Outlook: With former coach Scott Frost leaving for Nebraska, the Knights really weren't able to cash in on their unbeaten season and self-proclaimed national championship on the recruiting trail. New UCF coach Josh Heupel salvaged their efforts by using 12 of his 19 available scholarships on linemen.

Now the real work begins for Heupel and his assistants, who have to replace many of the key contributors from last season's record-setting team. At least they'll have quarterback McKenzie Milton, who threw for 4,037 yards with 37 touchdowns in 2017, and the top five rushers and five of the top six pass-catchers.

Milton will miss Smith, the team's top receiver in 2017 with 1,171 receiving yards and 13 touchdowns. Tight end Akins, who had 32 catches for 515 yards with four touchdowns, also elected to enter the draft instead of applying for an extra year of eligibility.

UCF also is losing two of its top linebackers in Burkett and Griffin, who led the team with 13.5 tackles for loss. Pittman, Guerad and Hughes also leave big holes.

UCF's schedule includes nonconference games against Florida Atlantic, Pittsburgh and North Carolina, and it will be an overwhelming favorite to repeat as American champion.

Outlook: LSU hired Ed Orgeron to replace Les Miles because he promised to hire two high-profile coordinators and recruit like a madman. After a 9-4 season in 2017 and a recruiting class that ranked No. 14 nationally, the Tigers' worst ranking since 2002, LSU fans are still waiting for results.

The Tigers were up and down in Orgeron's first season, beating Auburn and falling to Mississippi State (by 30 points), Troy (at home) and Notre Dame (in the Citrus Bowl). LSU's issues in 2017 were the same as they were under Miles: The Tigers struggled to pass the ball and score.

It won't be any easier in 2018, with six underclassmen turning pro, including Guice, Clapp and Weathersby. The Tigers have lost a whopping 31 underclassmen to the pros since 2013.

Orgeron made a change at offensive coordinator, parting ways with Matt Canada after one season and promoting tight ends coach Steve Ensminger to be Canada's replacement. At least LSU secured defensive coordinator Dave Aranda, who received a four-year, $10 million contract, the highest ever for an FBS assistant, after Texas A&M tried to hire him away.

The Tigers will play a nonconference game against Miami in Arlington, Texas, next season, along with road games at Auburn, Florida and Texas A&M.

Outlook: The Longhorns lost six games in coach Tom Herman's first season, which was disappointing, but his first full recruiting effort gives UT fans plenty of hope for the future.

Texas' recruiting class ranked No. 3 nationally, its first top-five class since 2012, and it signed 14 players ranked in the top 150 of the ESPN 300, which was the most of any program. Herman promised to close the Lone Star State's borders, and he did exactly that by signing five of the state's top six prospects, including the top three safeties in the country (B.J. Foster, DeMarvion Overshown and Caden Sterns).

Now, Herman has to improve the product on the field, and that starts with figuring out whether Shane Buechele or Sam Ehlinger is going to be the quarterback moving forward. The offensive line is going to have to do a better job protecting the quarterback, too, after allowing a whopping 34 sacks in 2017.

Defensive coordinator Todd Orlando upgraded the unit this past season, but he'll miss Jefferson, Elliott and Hill, three of his better players. UT plays USC, TCU and West Virginia at home, along with the annual contest against Oklahoma in Dallas.

Outlook: The Gamecocks exceeded expectations in coach Will Muschamp's second season, which ended with a come-from-behind 26-19 victory over Michigan in the Outback Bowl.

Muschamp built on that momentum by signing a top-20 recruiting class, which was led by No. 9 offensive tackle Dylan Wonnum, No. 25 defensive tackle Rick Sandidge and No. 7 inside linebacker Rosendo Louis, who was a late flip from FSU.

Muschamp seems to have learned from his mistakes in his first head-coaching stop at Florida; he dismissed offensive coordinator Kurt Roper after the South Carolina offense averaged only 24 points per game. Co-offensive coordinator/receivers coach Bryan McClendon will take over the job full-time after calling plays in the bowl game.

Quarterback Jake Bentley gets back top target Deebo Samuel, who missed the final 10 games with leg and foot injuries (he scored six total touchdowns in the first three games).

The Gamecocks will have to replace two starters on the defensive line, Moore and three starters in the secondary. Linebacker Bryson Allen-Williams also returns after missing most of 2017 with a shoulder injury.